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/*=========================================================================
*
* Copyright NumFOCUS
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* https://www.apache.org/licenses/LICENSE-2.0.txt
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*=========================================================================*/
#include <iostream>
#include "itkImageRegionIterator.h"
#include "itkShrinkImageFilter.h"
#include "itkImportImageFilter.h"
#include "itkTestingMacros.h"
int
itkImportImageTest(int, char *[])
{
// Create a C-array to hold an image
auto * rawImage = new short[8 * 12];
for (unsigned int i = 0; i < 8 * 12; ++i)
{
rawImage[i] = i;
}
// typedefs to simplify the syntax
constexpr unsigned int Dimension = 2;
using PixelType = short;
using ImportImageFilter = itk::ImportImageFilter<PixelType, Dimension>;
using ShortImage = itk::Image<PixelType, Dimension>;
// Create an ImportImageFilter filter
auto basicImport = ImportImageFilter::New();
ITK_EXERCISE_BASIC_OBJECT_METHODS(basicImport, ImportImageFilter, ImageSource);
ShortImage::Pointer image;
itk::ImageRegion<Dimension> region;
itk::ImageRegion<Dimension>::IndexType index = { { 0, 0 } };
itk::ImageRegion<Dimension>::SizeType size = { { 8, 12 } };
region.SetIndex(index);
region.SetSize(size);
// local scope to make sure that imported data is not deleted with ImportImageFilter
// but with the ImportImageContainer is creates.
{
// Create an ImportImageFilter filter
ImportImageFilter::Pointer import;
import = ImportImageFilter::New();
// Test the SetVectorMacros and GetVectorMacros
const itk::SpacePrecisionType data[2] = { 1.0, 1.0 };
import->SetSpacing(data);
const float data2[2] = { 1.0, 1.0 };
import->SetSpacing(data2);
const itk::SpacePrecisionType * spacingValue = import->GetSpacing().GetDataPointer();
std::cout << "import->GetSpacing(): " << spacingValue << std::endl;
const double data3[2] = { 1.0, 1.0 };
import->SetOrigin(data3);
const float data4[2] = { 1.0, 1.0 };
import->SetOrigin(data4);
const itk::SpacePrecisionType * originValue = import->GetOrigin().GetDataPointer();
std::cout << "import->GetOrigin(): " << originValue << std::endl;
import->SetRegion(region);
import->SetImportPointer(rawImage, 8 * 12, true);
import->Update();
image = import->GetOutput();
}
// Create another filter
itk::ShrinkImageFilter<ImportImageFilter::OutputImageType, ShortImage>::Pointer shrink =
itk::ShrinkImageFilter<ImportImageFilter::OutputImageType, ShortImage>::New();
shrink->SetInput(image);
shrink->SetShrinkFactors(2); // Also tested with factors 3 and 4, with 12x12 image
ITK_TRY_EXPECT_NO_EXCEPTION(shrink->Update());
//
// The rest of this code determines whether the shrink code produced
// the image we expected.
//
ShortImage::RegionType requestedRegion;
requestedRegion = shrink->GetOutput()->GetRequestedRegion();
itk::ImageRegionIterator<ShortImage> iterator2(shrink->GetOutput(), requestedRegion);
bool passed = true;
for (; !iterator2.IsAtEnd(); ++iterator2)
{
std::cout << "Pixel " << iterator2.GetIndex() << " = " << iterator2.Get() << std::endl;
if (iterator2.Get() !=
itk::Math::RoundHalfIntegerUp<short>(static_cast<float>(
(shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] + shrink->GetShrinkFactors()[0] / 2) +
(region.GetSize()[0] *
((shrink->GetShrinkFactors()[1] / 2) + (shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[1]))))))
{
std::cout << " iterator2.GetIndex() Get() " << iterator2.GetIndex() << ' ' << iterator2.Get() << " compare value "
<< itk::Math::RoundHalfIntegerUp<short>(static_cast<float>(
(shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[0] + shrink->GetShrinkFactors()[0] / 2) +
(region.GetSize()[0] * ((shrink->GetShrinkFactors()[1] / 2) +
(shrink->GetShrinkFactors()[0] * iterator2.GetIndex()[1])))))
<< '\n';
passed = false;
}
}
if (passed)
{
std::cout << "ImportImageFilter test passed." << std::endl;
return EXIT_SUCCESS;
}
else
{
std::cout << "ImportImageFilter test failed." << std::endl;
return EXIT_FAILURE;
}
}
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